— I can’t get through to the general manager’s office.—The line is busy. Someone ________ the telephone.
#76155
A
must have used
B
could use
C
could have used
D
must be using
推荐题目
I chose the most popular major instead of my favorite one，but I had to drop out and started again where I＿＿＿have gone in the first place.
#62875
A
must
B
might
C
should
D
would
—How is the debate of your essay?—It ____ well, but I ____one of the key points.
#62979
A
might work; hadn’t forgot
B
needn’t have worked; forgot
C
could have worked; forgot
D
would work; hadn’t forgot
--- Must I finish my homework now?-- No, you ________. You can go home now.
#75390
A
needn’t
B
mustn’t
C
shouldn’t
D
can’t
– May I take the magazine out of the reading room?-- No, you can’t. You read it here. It’s the rule.
#75682
A
might
B
would
C
may
D
must